.sort {
  text-align: center;
  overflow: hidden;
  background-color: #eee;
  padding: 0 10px;
}
.sort a {
  color: #666;
  float: left;
  width: 25%;
  font-size: 12px;
  line-height: 30px;
  height: 30px;
}
.sort a.active {
  color: orange;
}
.lt_product {
  position: relative;
}
.loading {
  width: 50px;
  height: 50px;
  border: 3px solid blue;
  position: absolute;
  left: 50%;
  margin-top: 200px;
  margin-left: -20px;
  animation: zhuan 1s infinite linear;
}
@keyframes zhuan {
  from {
    transform: rotate(0)
  }
  to {
    transform: rotate(720deg)
  }
}
